Henry millingar



HENRY MILLINGAR, OF PITTSBURG, PENNSYLVANIA.

Letters Patent No. 110,930, dated January 10, 1871; antedated December30, 1870.

IMPROVEMENT EN VALVES FOR'OiL-PUMPS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whomI it may concern:

Be it known that I, HENRY Mrnnixcau, of the cit-y ot' Pittsburg, in thecounty oi' Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in Gas-Valves for Oil-Pumps; and I do hereby declarethe following 'to hc a tull7 clear, and exact description thereof,reference being had to the accompanying drawing forming part of thisspeciication, in which- Figure 1 is a vertical section through thecenter of my improved gas-valve;

Figure 2 is a horizontal cross-section through my valve at the line :cof tig. l;

Figure 3 is a vertical section of part of an oil-well, showing thearrangement of the gas-valve in relation to the pump and seed-bag andFigure 4 shows, in perspective, the valve detached.

1n thesevera-l iigurcs like letters refer to similar parts.

It is well known in oil-wells a large amountot' gas is generally emittedfrom the oil-bearing scams or veins, which, when 'the pump is insertedwith the seed-bag around it, finds no other vent than through theworking barrel ofthe pump into the tubing above, and that the 'passageof gas through the valves oi' the pump impedcs and often prevents theiraction.

Various devices have been employed to get rid of thegas by giving it avent, by means ot' gas-pipe and otherwise, to a point above the seed-bagand outside of 'the tubing, these devices being troublesome,complicated, and liablel to get out of order; besides,r that `bywithdrawing the gas from the well-tube the advantage which would begained from its upward pressure in aiding to lift the column of oilinthe well-tube is lost. f

My improvement then consists in the placing of a simple self-actinggas-valve in the well-tubing at any point above the pump-valves andbelow the seed-bag, in suoli manner that the gas may pass through itupwardfrom outside of the tubing below to the inside of the tubing abovethe valve.

My improved gas-valvc is designed to be screwed to the lower end of onepiece of tubing, and to the upper end of the piece ot' tubing next belowit, so as to form a connection between them, not being placed within thetube.

A is the outer shell 0f the gas-valve, which is of considerably largerdiameter than the well-tubing B, excepting at the neck or upper end,where it is contracted to such dimensions as to permit a section ofwell-tubing, B, to be screwed into it at a.

The interior of this shell A is cylindrical, forming the gas-valvechamber c.

Into the lower end of the shell A is screwed a short cylinder, F, theinterior diameter of which is slightly smaller than that of thevalve-chamber e, so as-to form a shoulder at i, on which thecircumferential edge of the gas-valve f rests so as to form acloselytitting joint to prevent the down-How of oil when the valve isclosed.

The short cylinder' F has an inner tubular piece, b, connected withl itby radial ribs or arms c c, and leaving a space, c', outside ot' theinner tubular piece b, and between it and the cylinder F, as shown iniig. 2, tbr the upward passage ot' gas into the chamber e when the valvej' is raised.

The bore ot the tubular piece b corresponds with that oi'thc lowertubing or pump-chamber 0, which is screwed into it, as shown in fig. 3.

An annular disk, f, forms the gas-valve, which covers the spacesc"between the shell A andthe tubular piece b, preventing (when closed)the passage ot' oil downward outside ot' the tubing C.

From `this annular disk or valve f depend two pieces h lc, which passdown through suitable holes in two. of the radial ribs or arms c, theholes being large enough in dialneter to allow the valve f t0 risefreely, and the pins being so long asl to extend a little below the ribsc c, and having but-tons g lg at their lower end to prevent the valverising too far from its seat.

The pins h hlteep the valve-disk f level, and prevent its being tiltedover and thus getting out ot' place.

The operation of this gas-valve is shown lin fig. 3, where D is theseed-bag around the well-tubing, which prevents the escape ot' gas inthat direction outside ot' the tubing.

E is the. pump-chamber below the gas-valve.-

As the gas is emitted from the veins in the well it rises upward outsideof the well-tubing C, below the gas-valve, and passes up through thespaces e c', around the tubular piece b, iig. 2, and, lifting thevalve-disk j, passes into the valve-chamber C and.

well-tubing` B, n-'herc it aids in lifting the column ot' oil in thewell-tubing, and passes out withfit at the top of the well. n

Having thus described my invention,

What I. claim as my invention, and desire to secure by Letters Patent,is

The gas-valve, consisting of the. combination ofthe tubular piece l),the valve-diskj, andthe shell A F,

constructed and arranged substantially as described, for the purpose ofgiving a passage for the gas into `the well-tubing at any point abovethe pump and below the seed-bag of oil-wells, in the manner'hereinbeforeset forth.

' In testimony whereof I, the said 'HENRY MILLIN- GAR, have hereunto setmy hand.

HENRY MILLINGAR.

W itncsses:

DAVID LoWRY, JOHN GLENN.

